Sigma 90mm F2.8 DG DN Review

October 6, 2021 | Mark Goldstein | Rating star Rating star Rating star Rating star Rating star

Sharpness at 90mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Sigma 90mm F2.8 DG DN lens was attached to a Sony A7 III camera body, which in turn was mounted on a sturdy tripod. Self-timer mode was activated. Slight tonal changes are due to slight changes in natural light during the session.

The full frame

The full frame at 90mm

The centre is very sharp even when shooting wide open, so you can happily use f/2.8-f/11. Diffraction sets in at at f/16 and especially f/22.

The edges aren't quite as sharp as the centre, being just a little soft at f/2.8, with f/5.6-f/11 the optimum settings.

Aperture Centre Crop Edge Crop
f/2.8 f4.jpg f4.jpg
f/4 f4.jpg f4.jpg
f/5.6 f5_6.jpg f5_6.jpg
f/8 f8.jpg f8.jpg
f/11 f11.jpg f11.jpg
f/16 f16.jpg f16.jpg
f/22 f16.jpg f16.jpg